Memory/ RAM Upgrades For Apple MacBook Pro 2011 from OWC
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Upgrading RAM in Your MacBook Pro 13" or 15" : 19 Steps (with Pictures) - Instructables
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Is It Worth It to Upgrade RAM on a Macbook Pro?
How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
M1 Mac RAM and SSD Upgrades Found to Be Possible After Purchase - MacRumors